CN105601850A - Preparation method of graphene oxide composite gel applicable to heavy metal adsorption - Google Patents
Preparation method of graphene oxide composite gel applicable to heavy metal adsorption Download PDFInfo
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F292/00—Macromolecular compounds obtained by polymerising monomers on to inorganic materials
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/26—Synthetic macromolecular compounds
- B01J20/265—Synthetic macromolecular compounds modified or post-treated polymers
- B01J20/267—Cross-linked polymers
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
- C02F1/62—Heavy metal compounds
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- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/18—Suspension polymerisation
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/28—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum
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- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/46—Materials comprising a mixture of inorganic and organic materials
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2201/00—Foams characterised by the foaming process
- C08J2201/04—Foams characterised by the foaming process characterised by the elimination of a liquid or solid component, e.g. precipitation, leaching out, evaporation
- C08J2201/048—Elimination of a frozen liquid phase
- C08J2201/0484—Elimination of a frozen liquid phase the liquid phase being aqueous
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2351/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J2351/10—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to inorganic materials
Abstract
The invention discloses a preparation method of a graphene oxide composite gel applicable to heavy metal adsorption. The preparation method comprises the following steps: by using sodium acrylate and acrylamide as monomers, a graphene oxide hydrogel as an additive, potassium persulfate as an initiator, N,N-methylene-bis-acrylamide as a crosslinking agent and deionized water as a reaction solvent, adding the potassium persulfate and N,N-methylene-bis-acrylamide into a graphene oxide-sodium acrylate-acrylamide mixed water liquid to react at 45-60 DEG C in an N2 atmosphere for 2-3 hours, thereby obtaining a massive composite hydrogel product; and carrying out freeze-drying and vacuum drying on the composite hydrogel product to obtain the macroporous network-polymer graphene oxide composite gel. The graphene oxide composite gel can be well used in treating wastewater containing Pb<2+> and Cd<2+>, and has the advantages of low cost and simpler preparation method.
Description
Technical field
The present invention relates to heavy metal adsorption field of material preparation, be specifically related to a kind of graphene oxide that is applied to heavy metal adsorption and answerClose the preparation method of gel.
Background technology
Heavy metal refers to that proportion is greater than 4.0 and to the virose element of organism, mainly comprises Hg, Cd, and Pb, As, Cr, Ni, Cu,Zn etc. Heavy metal pollution is mainly derived from mining, ore dressing, chemical industry, printing and dyeing, plating, battery, coating, pottery, pesticideA large amount of waste water with the discharge of the industry such as fertilizer. Heavy metal extensively distributes in water, air and soil and organism, and water body is its dirtThe main media dying, enters the heavy metal in water body, even if concentration is very low, once absorbed by aquatile, owing to not given birth toThing degraded can be accumulated to higher concentration, and can finally enter human body and be accumulated in some Organ and tissue by drinking-water and food chain,Disturb normal physiological function, infringement health. Pb and Cd are common in industry and are considered to human body and environment dangerTwo heavy metal species that evil is larger. Pb2+The infringement of nervous system, hemopoietic system and kidney to human body is the most serious, and poisoner goes outNow have a headache, the symptom such as stomachache, diarrhoea, anaemia, fatigue and poor appetite. Pb2+Especially remarkable to children's harm, can hinderChildren's intelligence development, causes irreversible brain damage. Cd2+Once enter human body, mainly in the organs such as liver, kidney, thyroid glandAccumulate, cause acute and chronic poisoning, make the absorption imbalance of calcium, cause the symptoms such as osteoporosis, osteanabrosis distortion and ostalgia, simultaneouslyThere is carcinogenic teratogenesis. Pb in the World Health Organization (WHO) regulation drinking water, the maximum permissible concentration of Cd is respectively 0.003And 0.01mg/L, China trade effluent discharge standard GB-1996 specifies Pb, the highest permission concentration of emission of Cd is respectively 1.0 Hes0.1mg/L. Therefore, to containing Pb2+、Cd2+Effective control and processing Deng effluent containing heavy metal ions are to need badly in environmental protection workOne of problem solving.
Process at present containing Pb2+、Cd2+Deng the method for the industrial wastewater of metal ion mainly contain chemical precipitation method, ion-exchange,Absorption method, membrane separation process and electrochemical process etc. Wherein absorption method is to rely on adsorbent surface activated adoption site to heavy metal ionSuction-operated and remove heavy metal ion, absorption method has that adsorption capacity is large, the rate of adsorption is fast, good selective, suitableClose the effluent containing heavy metal ions of processing low concentration, large volume, after desorb, be also expected to realize the recovery of precious metal. Sorbing material kindClass is various, comprise active carbon prepared by various agricultural fishery residues, modified mineral material (zeolite, imvite, concave convex rod) andModified natural polymer (cellulose, lignin and shitosan) etc. Commercial conventional adsorbent has active carbon at present, but itsAdsorption capacity is little, selective low, regeneration difficulty, and the application of active carbon is very restricted. Therefore, development absorption is heldAmount is large, the rate of adsorption is fast, clearance is high, regeneration is easy, cost is low and environment amenable adsorbent is still necessary.
In recent years, graphene oxide becomes because of its huge specific area, electron rich structure and surperficial oxygen-content active functional groupThe focus sorbing material of effluent containing heavy metal ions is processed in research, and show good adsorption effect (Wu Chun comes, Fan Jing. GrapheneThe application [J] of material in heavy metal wastewater thereby adsorption cleaning. chemical industry progress, 2013,32 (11): 2668-2673.). But, GO surfaceOxygen-containing functional group (carboxyl and the hydroxyl) quantity that Adsorption of Heavy Metal Ions is played an important role is very limited, and therefore graphite oxide is usedBe not very desirable in the effect of processing effluent containing heavy metal ions.
Summary of the invention
The object of the invention is to overcome above-mentioned the deficiencies in the prior art, and a kind of have abundant carboxyl and amide group be provided,And the graphene oxide that is applied to heavy metal adsorption that technique is simple, raw material is easy to get, with low cost, adsorption effect is good is compound solidifyingThe preparation method of glue.
For achieving the above object, the present invention by the following technical solutions: a kind of graphene oxide that is applied to heavy metal adsorption is compoundThe preparation method of gel, taking PAA, acrylamide as monomer, graphene oxide hydrogel is additive, potassium peroxydisulfate isInitator, N, N-methylene-bisacrylamide, deionized water is reaction dissolvent, makes for heavy metal through suspension polymerizationThe graphene oxide plural gel of absorption.
By graphene oxide, PAA and acrylamide mixing water liquid at N2In atmosphere, add potassium peroxydisulfate and N, N-AsiaMethyl-bisacrylamide reacts 2～3h and obtains block composite aquogel product within the scope of 45～60 DEG C, and composite aquogel is producedThing obtains macroporous netlike polymer graphene oxide plural gel through freeze drying and vacuum drying.
The mass ratio of described acrylamide and PAA is 1:4～1:1, graphene oxide, potassium peroxydisulfate and N, N-methylene-bis-0.5～2%, 1.2～2.4% and 0.4～1% of the shared total mass ratio of acrylamide difference, institute's water is distilled water, and pH existsIn 9.0～11.5 scopes.
As optimal technical scheme, the preparation method of described graphene oxide plural gel is: by 150mL graphene oxide,PAA and acrylamide mixing water liquid are at N2In atmosphere, add potassium peroxydisulfate and N, N-methylene-bisacrylamide,Within the scope of 45～60 DEG C, reaction 2～3h obtains block composite aquogel product, and composite aquogel product is dry through freeze drying and vacuumThe dry macroporous netlike polymer graphene oxide plural gel that obtains. Its Raw proportioning is the matter of acrylamide and sodium acrylate monomersAmount is than being 1:4～1:1, and mixing material cumulative volume is 150～200mL, graphene oxide, potassium peroxydisulfate and N, N-methylene-bis-thirdAlkene acid amides accounts for respectively 0.5～2%, 1.2～2.4% and 0.4～1% of monomer gross mass, and institute's water is distilled water, and pH is 9.0～11.5In scope.
As optimal technical scheme, preferred acrylamide and acrylic acid in the preparation concrete steps of described graphene oxide plural gelThe mass ratio of sodium monomer is 1:1, and monomer total amount 10g is example, comprises the preparation of graphene oxide hydrogel, de-polymerization inhibitor acrylic acidThe preparation of the preparation of sodium and graphene oxide plural gel.
One, the preparation of graphene oxide: adopt the Hummers legal system of modification for graphene oxide taking graphite powder as raw material:
A. get 10.0g and analyze pure graphite powder and the dense H of 50mL2SO4(95-98％)、8.5gK2S2O8And 8.5gP2O5AddAfter mixing in 1000mL there-necked flask, at 85-95 DEG C after mechanical agitation 4～6h, slowly drip 200mL distillation after dropping to room temperatureWater dilution mixed solution, transfers in large beaker and adds enough distilled water dippings 3 days, changes during this time water 4 times, bottom vacuumizing filtration,Filter cake is placed in 80 DEG C of vacuum drying 24h, obtains pre-oxidation graphite powder.
B. pre-oxidation graphite powder grind into powder is placed in 1000mL there-necked flask, adds the dense H of 230mL2SO4, machineryUnder stirring and ice-water bath condition, slowly add 60gKMnO4, control during this time the interior mixing material temperature of there-necked flask below 20 DEG C,Add rear water bath device and be warming up to 35 DEG C of stirring reaction 4.5h, then slowly drip 500mL distilled water, stirring reaction 2h againAfter add 30mLH2O2(30%) make mixture become to such an extent that glassy yellow obtains graphite oxide, mixture is transferred in large beaker and addsDistilled water dipping 3 days, changes water 5 times during this time, lower floor's suspension through distilled water repeatedly centrifugation to supernatant approach after neutrality,Take off the ultrasonic graphene oxide that disperses to obtain of layer yellowish-brown material, taking a morsel is placed in 90 DEG C of vacuum drying 12h and records graphene oxide waterIn gel, the mass fraction of graphene oxide is 3%.
Two, the preparation of PAA:
Get and analyze this acrylic monomers solution 50mL of pure concentration known, in enriching NaOH and after be transferred to tri-mouthfuls of burnings of 500mLBottle, after adding 2.0g activated carbon to mix, warming-in-water to 45 DEG C, the sub-stirring and adsorbing 3h final vacuum of magnetic force suction filtration, filtrate is made intoIt is for subsequent use that 500mL PAA solution is placed in shady and cool dry place, and the concentration of gained PAA is 0.388g/mL.
Three, the preparation of graphene oxide plural gel:
1. take the hydrogel (about 40mL) of 200mg pure zirconia Graphene, after ultrasonic dispersion 30min, drip concentrated ammonia liquor and adjustPH to 10.0～11.5, are transferred to 500mL there-necked flask;
2. getting 13.0mL concentration is the PAA of 0.388g/mL (5.0g left and right), pH=6～7, drips dense NaOH, adjustsBehind pH to 10～11 (about 30mL), transfer to the there-necked flask in reaction unit, at room temperature start magnetic force and stir;
3. take 5.0g acrylamide, add there-necked flask after being made into 50mL solution with distilled water, under magnetic force stirs withGraphene oxide and PAA mixing suspension mix;
4. logical N2Warming-in-water to 35 DEG C after 15～20min deoxygenation, continues at N2Under protection atmosphere, accurately take successively K2S2O80.24g and N, N-methylene-bisacrylamide 0.04g is made into respectively 20mL and 10mL aqueous solution dropping funel slowly addsTo there-necked flask;
5. be warming up to 45 DEG C and start reaction, along with the carrying out of reaction, solution starts viscosity and increases, and starts air-blowing bubble, after 1hObtain the jello that viscosity is larger, continue to be warming up to 60 DEG C of insulation 1～2h;
6. take out after polymer gel and be cut into bulk with scissors, and with distilled water immersion 1～2 day, change during this time water 2～3 times to removeLittle molecule;
7. fritter shape composition polymer hydrogel obtained in the previous step is placed in to freeze drier freeze drying acquisition coarse pored solidifyingGlue, then transfer to and in vacuum drying chamber, be placed in that at 60 DEG C, after dry 48h, to grind to form dry gel powder for subsequent use.
The prepared adsorbent of the present invention is containing Pb2+With Cd2+Application in ion waste water: by above-mentioned prepared graphene oxidePlural gel is put into and is contained Pb2+With Cd2+Simulated waste in, at best pH=4.5, temperature is to adsorb 24h at 25～45 DEG C, inhaleAfter attached balance, filter, filtrate is measured residual concentration C through flame atomic absorption spectrophotometere, and press equation (1) and (2) calculating heavy metalThe adsorbance Q of ion on adsorbenteAnd clearance R (%) (mg/g).
Wherein C0And Ce(mg/L) be respectively the residual concentration after initial concentration and the adsorption equilibrium of heavy metal ion in waste liquid,V is waste liquid volume, the dry weight (g) that W is adsorbent.
The technical solution adopted in the present invention has following beneficial effect: consider and on polyacrylic acid strand, contain numerous carboxylicsBase, and the cross-linked copolymer of Sodium Polyacrylate and polyacrylamide can form interpenetrating networks gel, under Freezing-Melting Condition, even can becomeFor macroporous network gel, the present invention's copolymerized grafting oxidation in graphene suspension by acrylamide monomer and sodium acrylate monomersGraphene, forms specific area large and have a macropore plural gel sorbing material of many carboxyl-functionals. General Sodium Polyacrylate is with poly-The copolymer gel of acrylamide has the shortcomings such as mechanical property, mechanical strength and acid-alkali-corrosive-resisting poor performance, has limited it at waterThe recycling of process field, and graphene oxide has excellent mechanical property, mechanical strength and acid-alkali-corrosive-resisting etc. justFeature, is a kind of extraordinary enhancing packing material, thereby certainly will can increase polymer gel at waste water adding of graphene oxideThe potentiality of the application in process field. The prepared graphene oxide plural gel of the present invention is to processing containing Pb2+And Cd2+Waste water sideFace have a good application, and raw material is easy to get, with low cost, preparation method is fairly simple.
Brief description of the drawings
Fig. 1 be in the present invention adsorbent under different pH to (a) Pb2+With (b) Cd2+The adsorption effect figure of ion waste liquid;
Fig. 2 be in the present invention adsorbent to different initial concentrations (a) Pb2+With (b) Cd2+The adsorption effect figure of ion waste liquid.
Detailed description of the invention
Further illustrate technical scheme of the present invention below in conjunction with accompanying drawing and by detailed description of the invention.
Embodiment 1
A preparation method who is applied to the graphene oxide plural gel of heavy metal adsorption, concrete steps are as follows:
1. taking prefabricated 3%wt graphene oxide hydrogel 6.67g (containing pure zirconia Graphene 200mg) with small beaker adds30mL distilled water stirs 1～2min and is placed on ultrasonic dispersion 30min in ultrasonic cleaning instrument, stops ultrasonic rear dropping concentrated ammonia liquor and regulatesPH of suspension=10.0～11.0;
2. pour in small beaker with the PAA solution 13.0mL that 50mL graduated cylinder is got prefabricated concentration 0.388g/mL, useAfter the NaOH solution of 0.1mol/L regulates pH to 10.0～11.0 scope, adding distil water is made into about 40mL solution;
3. accurately weigh 5.0g acrylamide adding distil water in small beaker, and stir and make it fully to dissolve and be made into approximately 40 with glass barClear solution;
4. by 1., 2., 3. gained liquid at room temperature adds the 500mL there-necked flask in water bath device successively, starts magnetic forceStir and make it to mix with 200rpm rotating speed, logical N2Deoxygenation 15～20min; 5. warming-in-water to 30 DEG C, accurately takes 0.24gK2S2O8, 0.04gN, N-methylene-bisacrylamide is made into respectively 20mL, 10mL solution, at N2Under atmosphere, use successively dropping liquidFunnel slowly joins in there-necked flask, finishes and is warming up to 45 DEG C of reaction 1h, after mixture viscosity obviously increases to gel, heats upBe incubated 1～2h to 60 DEG C and obtain black block shaped polymer hydrogel;
6. take out after black block shaped polymer is cut into little cube of bulk and use distilled water immersion 3 days, change during this time water 5 times to go out little moleculeWith other water-solubility impurities;
7. product obtained in the previous step is obtained to the suction of graphene oxide plural gel through freeze drying and 60 DEG C of vacuum drying 24～48hAttached dose, grind to form after fine grained for subsequent use.
The graphene oxide plural gel adsorbent obtaining with embodiment 1 is to Pb2+And Cd2+Carry out Adsorption experiment.
Accurately take the graphene oxide plural gel adsorbent preparing in 13 parts of 0.05g embodiment 1 and join respectively 13In 250mL round-bottomed flask, then add successively pH=2.0,3.0,3.5,4.0,4.5,5.0, C0Pb (the NO of=200mg/L3)2Solution100mL and pH=2.0,3.0,3.5,4.0,4.5,5.0,5.5, C0Cd (the NO of=72mg/L3)2(pH of solution is with dense for solution 100mLDegree is the HNO of 0.05mol/L3Regulate with NaOH solution), in the water-bath of 25 ± 2 DEG C, magnetic force rotor speed is 120rpm barUnder part, adsorb after 24h, in funnel, filter with Medium speed filter paper, discard about 10mL filtrate above, in the filtrate of collecting from behind, getIn 5mL, dilute 10 times, measure and adsorb rear Pb with flame atomic absorption spectrophotometer (AA6300C, Japanese Shimadzu)2+And Cd2+IonResidual concentration. Result is as shown in Figure 1: graphene oxide plural gel is to Pb2+The adsorbance of ion and clearance,In the scope of pH=2.0～5.0, all increase with the increase of pH, and at pH=4.0,4.5 have all obtained good effect, adsorbance is dividedBe not 355.6 and 366.7mg/g, corresponding clearance is respectively 88.9% and 91.2%, and the more remarkable effect of pH=5.0 very canCan partly will be owing to Pb2+Precipitation, Pb (NO during because of pH=5.03)2There is part research of chaotic phenomenon in solution; Same oxidation stoneChina ink alkene plural gel is to Cd2+The increase with pH in the scope of pH=2.0～5.0 of the Adsorption effect of ion increases, andPH=4.0,4.5,5.0 have very approaching Adsorption effect, in the time of pH=5.0 to Cd2+Adsorbance and the clearance of ion are respectively105.5mg/g and 73.26%.
Accurately take successively the graphene oxide plural gel adsorbent of preparation in 8 parts of 0.08g and 6 parts of 0.12g embodiment 1 respectivelyJoining concentration is the Pb (NO of the each 100mL of 20,50,100,200,250,300,350,400mg/L3)2Solution and concentration are respectivelyCd (the NO of the each 100mL of 44.7,89.4,134.1,178.8,223.5,268.2mg/L3)2In solution, be placed in 250mL bottle, at magneticPower rotor speed 120rpm, adsorbs 20h at 25 DEG C of bath temperatures, reaches after getting supernatant dilution after adsorption equilibrium and uses atomic absorption spectrumInstrument is measured Pb2+With Cd2+Ion residual concentration. Result is as shown in Figure 2: graphene oxide plural gel adsorbent is applicable to concentration for the treatment ofLower than the Pb of 250mg/L2+With the Cd of concentration lower than 50mg/L2+, its clearance is all more than 90%, and to Pb2+AdsorptionSuccessful is better than Cd2+The Adsorption effect of ion.
More than show and described general principle of the present invention and principal character. The technical staff of the industry should understand, the present inventionBe not restricted to the described embodiments, that in above-described embodiment and description, describes just illustrates principle of the present invention, is not departing from thisUnder the prerequisite of invention spirit and scope, the present invention also has various changes and modifications, and these changes and improvements all fall into claimedThe scope of the invention in. The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (3)
1. a preparation method who is applied to the graphene oxide plural gel of heavy metal adsorption, is characterized in that: with acrylic acidSodium, acrylamide are monomer, and graphene oxide is additive, and potassium peroxydisulfate is initator, N, N-methylene-bisacrylamideFor crosslinking agent, deionized water is solvent, makes for heavy metal ion adsorbed graphene oxide compound through suspension polymerizationGel.
2. the preparation method of the graphene oxide plural gel that is applied to heavy metal adsorption according to claim 1, its spyLevy and be: by graphene oxide, PAA and acrylamide mixing water liquid at N2In atmosphere, add potassium peroxydisulfate andN, N-methylene-bisacrylamide reacts 2～3h and obtains block composite aquogel product, by compound within the scope of 45～60 DEG CHydrogel product obtains macroporous netlike polymer graphene oxide plural gel through freeze drying and vacuum drying.
3. the preparation method of the graphene oxide plural gel that is applied to heavy metal adsorption according to claim 2, its spyLevy and be: the mass ratio of described acrylamide and PAA is 1:4～1:1, graphene oxide, potassium peroxydisulfate and N, N-AsiaMethyl-bisacrylamide accounts for respectively 0.5～2%, 1.2～2.4% and 0.4～1% of total mass ratio, and institute's water is distilled water,PH is in 9.0～11.5 scopes.
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Cited By (14)
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| CN106188393A (en) * | 2016-07-18 | 2016-12-07 | 河南工业大学 | Pre-irradiated method prepares high-elastic high-ductility graphene oxide/polyacrylamide composite gel |
| CN106423099A (en) * | 2016-10-18 | 2017-02-22 | 湖南大学 | Preparation method of jute/polymer gel and application of jute/polymer gel as heavy metal adsorbent |
| CN106732411A (en) * | 2017-03-01 | 2017-05-31 | 辽宁大学 | The preparation of acrylate functional graphene oxide adsorbent and its application on adsorption and enrichment gallium |
| CN106861642A (en) * | 2017-02-14 | 2017-06-20 | 华南理工大学 | A kind of preparation and application of the biomass-based hydrogel with high absorption capacity |
| CN107321330A (en) * | 2017-08-07 | 2017-11-07 | 北京师范大学 | Purposes of the PAA acrylamide crosslinking copolymer gel in absorption P elements |
| CN109626483A (en) * | 2018-12-24 | 2019-04-16 | 武汉格林环保设施运营有限责任公司 | A kind of Industrial Wastewater Treatment medicament and preparation method thereof |
| CN110065988A (en) * | 2019-04-23 | 2019-07-30 | 中国石油大学(华东) | A method of going heavy metal ion in water removal |
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| CN110746785A (en) * | 2019-11-25 | 2020-02-04 | 黄春美 | High-strength anti-freezing three-dimensional porous hydrogel adsorption material and preparation method thereof |
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| CN112456625A (en) * | 2020-12-15 | 2021-03-09 | 扬州工业职业技术学院 | Industrial wastewater treating agent and preparation method thereof |
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